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酮洛芬/酸改性蒙脱土缓释体系的制备及体外释药研究
引用本文:李婷婷,赵乐乐,王锐利,张淑秋.酮洛芬/酸改性蒙脱土缓释体系的制备及体外释药研究[J].高等学校化学学报,2017,38(5).
作者姓名:李婷婷  赵乐乐  王锐利  张淑秋
作者单位:山西医科大学药学院,太原,030001
基金项目:山西省青年科技研究基金,山西医科大学博士启动基金(批准号:03201529)资助.Supported by the Natural Science Foundation of Shanxi Province
摘    要:以盐酸改性蒙脱土为药物载体,采用离子交换法制备了酮洛芬/酸改性蒙脱土(KPF/acid-MMT)复合物.借助X射线衍射(XRD)、比表面积分析和扫描电子显微镜(SEM)等手段对复合物进行了结构表征;采用透析法研究了介质pH值对KPF/acid-MMT释放性能的影响;运用3种数学模型对其体外释放行为进行拟合.结果表明:经酸改性后,蒙脱土的比表面积由19.66 m~2/g增加到202.84 m~2/g,载药量由18.09%提高到37.24%;在人工模拟胃液(pH=1.2)和人工模拟肠液(pH=6.8)中,酮洛芬的累积释放量分别为18.6%和86.7%;零级动力学模型能更好地拟合和描述KPF/acid-MMT在人工模拟肠液中的体外释放行为.酸改性蒙脱土能有效提高药物的负载量,KPF/acid-MMT可实现药物的定向释放和缓释性能,有望制成肠道缓释口服药物制剂.

关 键 词:蒙脱土  酮洛芬  酸改性  pH响应  缓释载体

Preparation and in vitro Release of Ketoprofen/acid-montmorillonite
LI Tingting,ZHAO Lele,WANG Ruili,ZHANG Shuqiu.Preparation and in vitro Release of Ketoprofen/acid-montmorillonite[J].Chemical Research In Chinese Universities,2017,38(5).
Authors:LI Tingting  ZHAO Lele  WANG Ruili  ZHANG Shuqiu
Abstract:With acid-montmorillonite(acid-MMT) as the carrier of ketoprofe(KPF), KPF/acid-MMT composite was prepared by ion-exchange method and characterized by powder XRD, BET, SEM, etc.The effect of the pH of release media on in vitro release of ketoprofen was assessed by the dialysis method.Three models for in vitro drug release were used to simulate the release performance of KPF from the KPF/acid-MMT composite.The results showed that the surface area of acid-MMT increased from 19.66 m2/g to 202.84 m2/g, and the drug-loading increased from 18.09% to 37.24% compared with MMT.In vitro release ability of KPF/acid-MMT composite was affected by pH of the release solution.In the artificial gastric juice(pH=1.2) and in the artificial intestinal juice(pH=6.8), the in vitro cumulative release amounts of the composites were 18.6% and 86.7%, respectively.The zero order kinetics model could be used to describe the variation of in vitro release rate.
Keywords:Montmorillonite  Ketoprofen  Acid-treatment  pH-response  Sustained release carrier
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